Mr M’s Edexcel GCSE Mathematics A Higher Linear Paper 1 Answers June 2012

Are we allowed to know what the values in the question were in 23 a and b?

Would it be possible to upload the question paper?

Im curious to see what the new spec is all about

but thanks Mr M as always great job you do!

Got question 1 wrong! Didn't read the question properly and designed a question with suitable responses - doh. Didn't think designing a table was in the syllabus!
Will I get any marks

Mr M, would 60/200 be enough for a C?

Mr M, would 60/200 be enough for a C?

Mr M’s Edexcel GCSE Mathematics A Higher Linear Paper 1 Answers June 2011


1. Questionnaire

a) Suitable table (2 marks)

b) Sample too small OR not representative (1 mark)


2. Paving slabs

a) Yes (he needs 30 slabs) (3 marks)

b) £276.16 (3 marks)


3. Parcels

a) £10 (1 mark)

b) Ed is cheaper than Bill for distances under 20 miles and more expensive for distances over 20 miles. The cost is the same for a distance of 20 miles. (3 marks)


4. Stem and leaf diagram

2 | 9
3 | 1 3 5 6 9
4 | 2 3 3 4 6 8 9
5 | 2 4 5

Key: 2 | 9 = 29 mph (3 marks)


5. Medicine

8 (2 marks)


6. Shortcakes

a) 30 (2 marks)

b) 60 (2 marks)


7. Buses

11.00 a.m. (3 marks)


8. Algebra

a) $6y-15$ (1 mark)

b) $4x(2x+y)$ (2 marks)

c) $h=\frac{10t}{g}$ (2 marks)


9. Rotation

Rotation 180 degrees about (3, 3) (3 marks)


10. Train tickets

Railtickets (65p cheaper) (4 marks)


11. Parallelogram

39 (3 marks)


12. Orange juice

4 (3 marks)


13. Hexagon and octagon

105 degrees (4 marks)


14. Lighthouse and harbour

a) 35 km (1 mark)

b) 110 degrees (1 mark)

c) Position marked 4 cm away on correct bearing (2 marks)


15. Cumulative frequency

a) 170 g (1 mark)

b) Correct box plot (3 marks)

c) Median of group A is higher than that of group B and interquartile range of A is bigger than B or other correct comparisons (2 marks)


16. More algebra

a) $m^{-10}$ (1 mark)

b) $(x+5)(x-2)$ (2 marks)


17. Standard form

a) 1 (1 mark)

b) 0.000067 (1 mark)

c) $2.7 \times 10^{14}$ (2 marks)


18. Area of enlarged shape

1.5 (3 marks)


19. Probability tree diagram

a) Missing numbers: 0.6, 0.7, 0.3, 0.7 (2 marks)

b) 0.12 (2 marks)


20. Simultaneous equations

x = 3 and y = -2 (4 marks)


21. Circle theorems

Radius and tangent are perpendicular so angles OBA and ODA are 90 degrees

Angles in a quadrilateral sum to 360 degrees so angles DOB = 130 degrees

Angle BCD = 65 degrees as angle at circumference is half the angle at the centre of the circle (4 marks)


22. Histogram

a) Correct bars (frequency densities 3, 5, 3.6, 1.2) (3 marks)

b) 18 (2 marks)


23. Algebraic fractions

a) $\frac{x+4}{2x-3}$ (3 marks)

b) $\frac{7x-2}{x^2-4}$ (3 marks)


24. Recurring decimal

$\frac{31}{110}$ (3 marks)


25. Cylinder and sphere

r = 3x (3 marks)


26. Graph transformations

a) Translation 3 units in the positive x direction (2 marks)

b) Stretch scale factor 2 in the y direction (2 marks)

For 6a I stupidly put 32, but I think I did the working out right, do you know how many marks I will get?

And for 11, I put 39.1.. I don't know why, and I think I did my working out right, how many for that?

And thank you so much for these answers, you've really made me feel so much better!

6a) 1 mark

11) 2 marks

This assumes your working out was right.